Study On Damage-Based Seismic Design Method Of Reinforced Concrete Frame Structures

As people’s recognition for earthquake grows deepper,from single-target to multi-t arget,passive seismic resistance to active seismic isolation, the theory of seismic desig n was believed made great progress.Performance-based seismic design(PBSD) theory is a new concept in civil engineering field. There’s a common cognition that PBSD is more reasonable than force-based design.PBSD can be divided into three methods:energy-based seismic design damage-based seismic design and displacement based seismic design(DBSD).Because DBSD is simply and directly, much attention has been paid to it and many researches have been done. But there are some problems:the influence of duration and hysteretic energy dissipation are not considered in the displacement-based performance design(DBSD).Though researches have been done on damage-based design which damage index plays a role as checking the designing result, but this method is not intuitive, and the damage index is not really " control" the whole design process.In this paper, the disadvantadge of the DBSD and the force-based seismic design is briefly discussed,and then basic theory for damage-based performance seismic design is presented.For modern seismic design allows a structure to develop inelastic response during moderate to severe earthquake,the response reduction factor (RD) is considered.Then the procedures are showed in detail.The application of the method is showed by a design examples,and finnaly inelastic analysis is done to demonstrate the feasible of the method presented in this paper.As is known to all.many uncentainties are involed in seismic design, so in the last chapter,a method that combining the method of damage-based performance design with the method of reliability-based probability design and a design procedure for SDOF is put forward.